Blast furnace construction



April 1, 1941. A. J. BOYNTON BLAST FURNACE consmucnon Filed Aixg. 5,1959 2 Sheets-Sheet 1 INVENTOR. (KM/4w J Bqyz M074,

ZTTORNEYQ.

Patented Apr. 1 1941.

'FFlCE BLAST FURNACE cous'rnpc'rron' Arthur J. Boynton, Winnetka, Ill.,-assignor to H. A. Brassert & Company, Chicago,

poration of Illinois 111., a cor- Application August 5, 1939, S crial No. 288,5ll3

9 Claims. (01.122-6) This invention relates to new and improved cooling apparatus for the inwalls of blast furnaces, or for the cooling of other furnaces, where the requirements are similar to those of the blast furnace.

The method of cooling the inwall of the bias furnace has heretofore generally been by mans of horizontal rows of coolers placedin the wall of the furnace. These coolers have been made of bronze or of cast iron with steel piping inserted within the casting. They have been located with the faces of the coolers at various distances from the face of the 'inwall, but usually The construction of the present invention overcomes the objections described above as inherent -in the use of horizontal or vertical coolers by eighteen inches or more back of the face, and

sometimes with the outer edge ofthe coolers abutting the shell. Location of the cooler's with their faces flush with the face of the inwall results in rapid erosion of the inwall into a roughened condition, and is seldom or never practiced.

The rows of coolers have been placed at various-Q0 distances apart in a vertical direction. Each row has generally presented an uninterrupted cooling effect in a horizontal direction. The correct determination of the vertical distance beinvention in" the accompanying drawings, in

tween coolers has depended on the necessity of avoiding the wearing of horizontal grooves in the lining between the horizontal rows of coolers, this wear producing what is sometimes known as a washboard effect. This condition interrupts the smooth and uniform descent of stock. and is" r unfavorable to good operation. If the horizontal rows are placed closely together, so asto miniproviding a cooler construction involving both horizontal and vertical cooling members.

It is an object of the present invention to provide new and improved apparatus for cooling the walls of blast furnaces and the like.

It is a further object to provide a cooling system which permits the effective cooling of such furnace walls by means of a substantially permanent installation of low first cost and with a minimum maintenance cost.

It is an additional object to provide a cooling system including both circumferentially and ver- I tically extending members comprising singlecooling units.

It is also an'object to provide a cooling sys- Q tem located in furnace walls which permits con to a cool area."

Other and further description proceeds.

' I have shown a preferred-embodiment of my objects will appear as the which- 7 Figure 1 is a plan view of an individual cooler;

m ize this washboard-eflect, the cost of cdollng is increased and the amount of cooling may be being supported in part by the shell, either directly or bymeans of socket plates into which the coolers were inserted. None of these variatical. These vertical grooves caused no interso great as to injure the furnace practice. Cool- I ers of the horizontal type have been made re-' 5. movable or irremovable, the removable coolers,

ruption to the flow of stock, and on this account they were preferable to the horizontal. However, the vertical coolers interposed no limitation system of brickwork laid in courses as well as did the horizontal coolers.

Figure 2 is an elevation ofthe cooler of Figure 1 as seen from the right;

Figure 3 is a, front elevation of the cooler of Figure 1;' h' Figure 4 is a' fragmentary vertical section, partly in"diagramma'tic form, showing the installation of the coolers in a furnace wall;

Fl method of connecting to the cooler through the exterior furnace shell of thefurnacei I Figure 6 is a fragmentary horizontal section on progressive planes showing the coolers installed 4 in the brickwork of a furnace;

- Figure '7 is a vertical section taken on the arcuate line 1-1 of Figure 6; and

Figure 8 is a fragmentary elevation of the outer face of a furnace 2 fiThe cooler as shown in Figures 1, 2 and 3 comprises four separate extensions The first extension I is adapted to extend horizontally from the-inside of the shell to intersect the arc in which the horizontal cooling section I! of the cooler is to be located. Extension II, as shown,

' extends horizontallyand radially of. the horizontal cross-section of'the furnace. This section ll may be madethreeinches high and thilae -J- incheswide to suit the customary thickness of tinuous bonding of the brick from a hot area e '5 is a fragmentary elevation showing a wall with the coolersinstalled inwardly extending section II.

connects the vertical cooling section I3 and theblast furnace brick as used in this country. This particular dimension is not essential to the invention and obviously the dimensions of all portions of the cooler may be changed to suit the brick withwhich the cooler'is' to be used. The arcuate cooling section I! may be made four and one-half inches wide and three inches thick. It-

is designed to extend horizontally and at a constant distance from the vertical central axis of the furnace. The length of this extension may be varied to suit the intensity of the cooling cooler section it to the section II- of an adjacent cooler.

It will beapparent that effective cooling is done' sion of the descending stock, is limited in a vereffectdesired. It may, for usual conditions, be

constructed about four feet long.

The substantially vertical extension l3 rises a distance which is the multiple of the thickness of the brick used, less a fraction of an inch for clearance and to guardagainst any assembling difficulty due to roughness of the casting. This extension is preferably three inches thick in the direction extendingcircumferentially of the furnace and four and one-half inches wide in the direction radially of the furnace. The number of courses of brick which may be laid above extension l2 in reaching the top of extension I: will .vary in accordance with the intensity of the cooling effect sought. Under usual conditions the height of section l3 may be the equivalent of seven courses-of brick.

The horizontally and radially extending fourth extension 14 is similar in dimensions to the first Extension shell of the furnace.

In Figure 4 the brick lining or wall of the furnace I5 is supported on a foundation l6 and en- In Figure '1 is shown one method ofinstallingthe coolers in the brickwork with' the horizontal cooling sections l2 inadjacent coolers located to form continuous cooling rings circumferentially about the furnace while the vertically extending cooler sections l3 are staggered in alternate rows to provide maximum resistance to wear in a horizontal direction. It will be understood that if closed in a metallic shell II. This figure shows desired the coolers maybe located with the verticalsections .13 of ;the coolers in successive series in'alignment to provide continuous cooling surfaces in 'bothdirections. Similarly, if desired, the horizontal sections l2 of the may be placed in the furnace in a manner to afford staggered or -offset cooling sections in this direction.

connection is,shown in detail'in Figure 5 where theshell n ofthe; furnace is providedwith a tical direction by the horizontal extension I2 and in a horizontal direction by the vertical extension l3.

It will also be apparent that the cooler is firmly held in position by the bedding of extensions H,

l2 and M, by the connection of extensions II and [4 at the shell, and by the bonding of all four extensions into the brickworkof the furnace.

It will be apparent that a continuous bonding of thebrick from the face of the inwall to the shell is possible, in spite of the presence of the cooler, and that the cooler interferes very little the cooler of the present invention the brick is continuously bonded from a hot area'into a cool one, and destruction of the wall by the bodily dropping out of bricks 'is prevented.

The system of cooling, according to this invenv tion, consists in placing individual coolers in the wall in such relationship to each other that wear will be minimized. This will generally result in placing the individual coolers so that continuous horizontal lines of coolingsmill be formed by the second extensions of the respective coolers, while staggered placing of the'third extensions of alternate horizontal rows of coolers will provide maxif mum resistance" to wear in a horizontal direction. It will also be possible to provide continuous cooling surfaces in both directions. L

Itwill be apparent that the extent of' cooling at various heights of the furnace may be varied by changing the shape and position of the individual coolers, so. as to bring the cooling closer to the face of the-inwall, and also so as to increase or decrease the vertical and horizontal distance between cooling faces. It is alscrpossible to build extension I3 vertical, or slightlyinclined to suit the nominal batter of the inwall.

While I have shown one preferred embodiment of my invention, this isto be understood to be illustrative only as it is capable of variation to meet differing conditions and requirements and I contemplate such modifications as come within the spirit and scope of'the appended claims.

I claim:v

1. A cooler for furnace walls comprising an elongated hollow ember of substantially uniform cross-sections area throughout its length and having a portion adapted to extend inwardly from the outer face of a furnace'wali, a second rectangular opening IS. The rectangular plate l8, indicated in broken lines, is located within the shell behind the opening so as to afford a full closure of the opening upon settling or movement of'the brickwork relative to the shell. The radial section II of the cooler has a'water pipe 2| connected thereto. A-general method ofconnecting up a plurality of coolers is' shown in Figure 8 portion at approximately right angles to the first section and adapted to extend horizontally ap- 1 proximately parallel to the face of the wall, a

'third portion adapted to extend vertically of the furnace wall, and a fourth section adapted to extend from the third'portion to theouter face of the furnace wall. g

2. A cooling system for furnace walls consisting of brickwork comprising a plurality of coolers each having a horizontally extending cooling where' the pipes 20 are shown as connecting one 5 portion and 9. directly connected vertically e'xsaid coolers being placed in the walls to provide aces,

tendlng'cooling portion, said coolers being placed 4 area slightly smaller than the brick used in the practically continuous horizontal cooling faces connected at intervals by vertically extending cooling 1aces,'the coolers being of a cross-sectional wall and of substantially the same cross-sectional form as the brick, and being; so related to the brick area that the brickwork of the trellis continuousiy bonded from hot side to cool side.

ARTHUR J. nom'ron. 

